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  1. 'Libido' in the larger farm animals: a review

    Contributor(s):: Wodzicka-Tomaszewska, M., Kilgour, R., Ryan, M.

    The term 'libido', first used by Freud to refer to the force by which the sexual instinct is represented in the mind, has become more and more used to refer to some aspects of sexual behaviour in large domestic animals. From being a wide, rather imprecise term, it has come to be defined in a...

  2. A new approach to overcoming a yearling Holstein bull's complete lack of motivation to mounting

    Contributor(s):: Foote, R. H., Presicce, G. A., Brockett, C. C.

    A young Holstein bull, selected for semen evaluation, was presented with a variety of sexual stimuli in an attempt to induce it to mount teaser animals and serve an artificial vagina. The bull was tested on 25 occasions and was scheduled for slaughter at 17 months of age because of a total...

  3. A note on genetic parameters for estrus symptoms in sows

    Contributor(s):: Gade, S., Bennewitz, J., Kirchner, K., Looft, H., Knap, P. W., Thaller, G., Kalm, E.

    Showing clear estrus symptoms contributes to the reproductive effectiveness of a sow. The aim of the study was to estimate genetic parameters and breeding values for estrus symptoms, a trait which included swelling and reddening of the vulva, interest in the boar and strength of the standing...

  4. A note on the effect of continuous ram presence on estrus onset, estrus duration and ovulation time in estrus synchronized ewes

    Contributor(s):: Romano, J. E., Fernandez Abella, D., Villegas, N.

    During fall season, 18 multiparous Corriedale ewes were divided into two equal groups for the continuous (CON) and intermittent (INT) presence of a ram. Oestrus was synchronized with fluorgestone acetate intravaginal sponges (Chronogest) that were left 14 days, plus an injection of 200 micro g of...

  5. A note on the effects of calf stimuli on the response of Zebu cows to Synchro-mate-B

    Contributor(s):: Quesada, Y., Estrada, S., Cubero, M., Garcia, F., Galina, C. S., Molina, R., Orihuela, A.

    The effect of Synchro-mate-B (SMB, ear implant containing 6 mg norgestomet) was measured on the oestrous response and the establishment of cyclicity using different calf stimuli. Multiparous Zebu cows, were divided in three groups. In the first, 32 animals were treated with SMB leaving the calves...

  6. A proposition for an updated behavioural characterization of the oestrus period in dairy cows

    Contributor(s):: Kerbrat, S., Disenhaus, C.

    In high-yielding dairy herds, the difficulty associated with successfully detecting oestrus is a problem that limits the reproductive performance of the herd. Traditionally, the period when the cow stands to be mounted is taken as the oestrus period. Housing and management factors such as the use...

  7. A quantitative study of pre-ovulatory behaviour in cattle (British Friesian heifers)

    Contributor(s):: Esslemont, R. J., Glencross, R. G., Bryant, M. J., Pope, G. S.

    24 British Friesian heifers with normal oestrous cycles were observed continuously for 24 days. The exhibition of 13 components of behaviour was recorded. The 11 most frequently seen components which involved the participation of 2 heifers were classified as aggressive (butting), investigatory...

  8. A refinement and validation of the Monash Canine Personality Questionnaire (MCPQ)

    Contributor(s):: Ley, J. M., Bennett, P. C., Coleman, G. J.

    The investigation of canine personality has failed to find strong agreement between studies as to its structure. The area has been hampered by a reliance on human personality models and by a tendency to limit the types of dogs used as subjects. These problems were recently addressed during the...

  9. A review of some factors affecting the expression of libido in beef cattle, and individual bull and herd fertility

    Contributor(s):: Petherick, J. C.

    This paper examines some of the factors that affect the expression of libido in beef cattle, focusing on the male and the free-ranging situation. The ways in which bull libido is assessed and the relationship between libido test results and fertility are discussed. Genetics play a role in...

  10. Activity in a hunted and an unhunted herd of Dall sheep

    Contributor(s):: Singer, F. J., Murphy, E. C., Cooper, B. A., Laing, K. K.

    The activity patterns of Dall sheep rams (Ovis dalli) of various horn size were studied during the rut in 3 herds (1 hunted and 2 unhunted). In all 3 herds, rams with horns that were superscript 3/4-curled and smaller rams were less frequently seen in ewe bands as the rut progressed. In 1 herd in...

  11. Age-related changes in the sexual performance of Hereford bulls

    Contributor(s):: Price, E. O., Borgwardt, R.

    The sexual performance of 12 Hereford-poll bulls was tested yearly over a 4-year period (from 12-13 months to 5 years of age). Year effects were significant for ejaculation frequency, frequency of mounts without ejaculation and the proportion of mounts that culminated in an ejaculation. As...

  12. Agonistic and mating behavior of adult chickens modified by social and physical environments

    Contributor(s):: Craig, J. V., Bhagwat, A. L.

    Agonistic and mating behaviour in 48 flocks of adult White Leghorn fowls was observed for 8 wk. A factorial experimental design allowed evaluation of behaviour as affected by genetic strain, presence or absence of males , age group (initial ages of 32 or 48 wk), and less crowded floor pens...

  13. An evaluation of the suitability of contraceptive methods in golden-headed lion tamarins ( Leontopithecus chrysomelas ), with emphasis on melengestrol acetate (MGA) implants: (II) endocrinological and behavioural effects

    Contributor(s):: Vleeschouwer, K. de, Elsacker, L. van, Heistermann, M., Leus, K.

    In order to be suitable, a contraceptive method should have little or no effects on social organization or behaviour. In callitrichids, changes in socio-sexual interactions between group members, due to hormonal changes induced by contraception, may have consequences for the reproductive...

  14. An investigation of the roles of boar-component stimuli in the expression of proceptivity in the female pig

    Contributor(s):: Pearce, G. P., Hughes, P. E.

    Combinations of the visual, auditory and/or olfactory cues from boars were presented to 60 Large White X Landrace sows as a choice in the arms of a T-maze. The relative attraction of the sows towards the combinations of stimuli was interpreted as showing that these stimuli elicited proceptive...

  15. Artificial selection of rams for sexual performance and its effect on the sexual behavior and fecundity of male and female progeny

    Contributor(s):: Bench, C. J., Price, E. O., Dally, M. R., Borgwardt, R. E.

    The objective of this study was to determine the effect of a single generation of artificial selection for sexual performance in rams on the sexual behaviour and fecundity of their male and female progeny. Ninety-two ram lambs born to sires selected for either high or low sexual performance were...

  16. Behavioral patterns of zebu bulls toward cows previously synchronized with prostaglandin F2 alpha

    Contributor(s):: Orihuela, A., Galina, C. S., Duchateau, A.

    With the objective of comparing the behaviour of synchronized cows in the presence or absence of a bull, 30 Indo-Brazilian cows with a mature corpus luteum, identified by rectal palpation, were injected with 25 mg PGF2 alpha at about day 8 of the cycle for 3 consecutive cycles. Immediately after...

  17. Behavioral responses of bulls kept under artificial breeding conditions to compounds presented for olfaction, taste or with topical nasal application

    Contributor(s):: Presicce, G. A., Brockett, C. C., Cheng, T., Foote, R. H., Rivard, G. F., Klemm, W. R.

    The object of this study was to test practical ways of influencing behaviour of bulls used for artificial insemination. Dairy bulls that were sexually active with regular semen collections were compared with sexually inactive bulls housed elsewhere, after being sampled in artificial breeding as...

  18. Behavioural patterns of zebu bulls towards females synchronised with PGF<sub>2 alpha </sub>; or oestrogens under corral and field conditions

    Contributor(s):: Piccinali, R., Galina, C. S., Navarro-Fierro, R.

    32 zebu bulls were tested to determine their behavioural patterns towards 5 cows previously synchronized with PGF2 alpha or oestrogens. Animals were tested 8 times at intervals of 20 days, for 15 min each time, in a corral (7 x 15 m) and given a score for sexual behaviour (0 = no sexual...

  19. Behavioural response to mixing of entire bulls, vasectomised bulls and steers

    Contributor(s):: Mohan Raj, A. B., Moss, B. W., McCaughey, W. J., McLauchlan, W., Kilpatrick, D. J., McGaughey, S. J.

    Four groups of cattle each consisting of 2 entire bulls, 2 vasectomized bulls and 2 steers, were created by mixing the constituent animals together and their homosexual (teasing and mounting) and aggressive (butting and pushing) behaviours were investigated in detail for the initial 4-h period....

  20. Bull sexual behaviour tests: stimulus cow affects performance

    Contributor(s):: Garcia, M. C., McDonnell, S. M., Kenney, R. M.

    64 Santa Gertrudis bulls were subjected to 3 series of sexual behaviour tests in which a bull was exposed to a restrained cow in a small pen for 10 min. Forty preovulatory and 22 postovulatory cows were used. Preovulatory cows elicited a significantly greater mount orientation response (sudden...